metabuilder/scss/components/app-layout.scss

// App layout, navigation, header, branding, tabs, scroll area
// Uses MD3 CSS custom properties from var(--mat-sys-*)

// ─── Navigation item ────────────────────────────────────────────────────────

.nav-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--mat-sys-on-surface);
  font-size: 14px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s ease, color 0.15s ease;

  &:hover {
    background: color-mix(in srgb, var(--mat-sys-on-surface) 8%, transparent);
  }

  &--active {
    background: color-mix(in srgb, var(--mat-sys-primary) 12%, transparent);
    color: var(--mat-sys-primary);
    font-weight: 500;

    &:hover {
      background: color-mix(in srgb, var(--mat-sys-primary) 16%, transparent);
    }
  }

  &__icon {
    flex-shrink: 0;
  }

  &__label {
    flex: 1;
    text-align: left;
  }

  &__badge {
    margin-left: auto;
  }
}

// ─── Tab bar ────────────────────────────────────────────────────────────────

.tab-bar {
  display: flex;
  gap: 4px;

  &__tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--mat-sys-on-surface-variant);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;

    &:hover {
      background: color-mix(in srgb, var(--mat-sys-on-surface) 8%, transparent);
      color: var(--mat-sys-on-surface);
    }

    &--active {
      background: color-mix(in srgb, var(--mat-sys-primary) 12%, transparent);
      color: var(--mat-sys-primary);

      &:hover {
        background: color-mix(in srgb, var(--mat-sys-primary) 16%, transparent);
      }
    }
  }
}

// ─── App layout root ────────────────────────────────────────────────────────

.app-layout {
  height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--mat-sys-surface);
  overflow: hidden;
}

// ─── App header ─────────────────────────────────────────────────────────────

.app-header {
  flex-shrink: 0;
  background: var(--mat-sys-surface-container);
  border-bottom: 1px solid var(--mat-sys-outline-variant);

  &__top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 12px 16px;
  }

  &__left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
  }

  &__right {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
  }

  &__bottom {
    padding: 8px 16px;
  }

  &__logo {
    display: flex;
    align-items: center;
    gap: 12px;
  }

  &__title {
    margin: 0;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--mat-sys-on-surface);
  }
}

// ─── App branding ───────────────────────────────────────────────────────────

.app-branding {
  display: flex;
  align-items: center;
  gap: 12px;

  &__title {
    margin: 0;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--mat-sys-on-surface);
  }
}

// ─── App logo ───────────────────────────────────────────────────────────────

.app-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(
    135deg,
    var(--mat-sys-primary),
    var(--mat-sys-tertiary, var(--mat-sys-secondary))
  );
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--mat-sys-shadow, #000) 20%, transparent);
  color: var(--mat-sys-on-primary);

  &--lg {
    width: 48px;
    height: 48px;
  }
}

// ─── Scroll area ─────────────────────────────────────────────────────────────

.scroll-area {
  overflow-y: auto;
  height: 100%;

  &--horizontal {
    overflow-x: auto;
    overflow-y: hidden;
    height: auto;
  }

  &--both {
    overflow: auto;
  }
}

// ─── Responsive container ───────────────────────────────────────────────────

.responsive-container {
  width: 100%;
  max-width: 100%;

  &--sm  { max-width: 640px;  margin-inline: auto; }
  &--md  { max-width: 768px;  margin-inline: auto; }
  &--lg  { max-width: 1024px; margin-inline: auto; }
  &--xl  { max-width: 1280px; margin-inline: auto; }
  &--2xl { max-width: 1536px; margin-inline: auto; }
}

// ─── PWA status bar pulse ────────────────────────────────────────────────────

.pwa-status-loading {
  height: 4px;
  background: var(--mat-sys-primary);
  animation: pwa-pulse 1.5s ease-in-out infinite;
}

@keyframes pwa-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

// ─── Main content area ───────────────────────────────────────────────────────

.app-content {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}